Thanks Mark. Those links were very helpful and saved a lot of my time. I
had good learning :)
For few of the character which I was aware, I think I can go via C URL tag.
But I have see as what other special characters I might have. Its coming
from third party and I do not control it and I am using those as parameter
for the link.
<a href="TestServlet?teststring=testing %26 testing1">Testing</a>
<c:url value="/TestServlet" var="myurl">
<c:param name="teststring" value="testing
!@#$%^&*()_-+=~`<>?/\"' testing1" />
</c:url>
<a href="<c:out value="${myurl}"/>">CURLTEST</a>
C URL seems to do pretty good job at encoding parameters.
Servlet TestServlet for param2 testing !@#$%^&*()_-+=~`<>?/"' testing1
On Wed, May 18, 2016 at 3:38 AM, Mark Thomas <[email protected]> wrote:
> On 18/05/2016 04:25, Kiran Badi wrote:
> > Hi ,
> >
> > I have this link in jsp which has below tags,
> >
> > <%@page contentType="text/html" pageEncoding="UTF-8"%>
> >
> > <a href="TestServlet?teststring=testing&testing1">Testing</a>
> >
> > and then my servlet looks like below,
> >
> > /*
> > * To change this license header, choose License Headers in Project
> > Properties.
> > * To change this template file, choose Tools | Templates
> > * and open the template in the editor.
> > */
> > package controller;
> >
> > import java.io.IOException;
> > import java.io.PrintWriter;
> > import javax.servlet.ServletException;
> > import javax.servlet.annotation.WebServlet;
> > import javax.servlet.http.HttpServlet;
> > import javax.servlet.http.HttpServletRequest;
> > import javax.servlet.http.HttpServletResponse;
> >
> > /**
> > *
> > * @author Kiran
> > */
> > @WebServlet(name = "TestServlet", urlPatterns = {"/TestServlet"})
> > public class TestServlet extends HttpServlet {
> >
> > /**
> > * Processes requests for both HTTP <code>GET</code> and
> > <code>POST</code>
> > * methods.
> > *
> > * @param request servlet request
> > * @param response servlet response
> > * @throws ServletException if a servlet-specific error occurs
> > * @throws IOException if an I/O error occurs
> > */
> > protected void processRequest(HttpServletRequest request,
> > HttpServletResponse response)
> > throws ServletException, IOException {
> > response.setContentType("text/html;charset=UTF-8");
> > try (PrintWriter out = response.getWriter()) {
> > /* TODO output your page here. You may use following sample
> > code. */
> > String param = request.getParameter("teststring");
> > String param1 = new
> > String(request.getParameter("teststring").getBytes("UTF-8"));
> > out.println("<!DOCTYPE html>");
> > out.println("<html>");
> > out.println("<head>");
> > out.println("<title>Servlet TestServlet</title>");
> > out.println("</head>");
> > out.println("<body>");
> > out.println("<h1>Servlet TestServlet at " +
> > request.getContextPath() + "</h1>");
> > out.println("<h1>Servlet TestServlet at " + param + "</h1>");
> > out.println("<h1>Servlet TestServlet at " + param1 +
> "</h1>");
> > out.println("</body>");
> > out.println("</html>");
> > }
> > }
> >
> > // <editor-fold defaultstate="collapsed" desc="HttpServlet methods.
> > Click on the + sign on the left to edit the code.">
> > /**
> > * Handles the HTTP <code>GET</code> method.
> > *
> > * @param request servlet request
> > * @param response servlet response
> > * @throws ServletException if a servlet-specific error occurs
> > * @throws IOException if an I/O error occurs
> > */
> > @Override
> > protected void doGet(HttpServletRequest request, HttpServletResponse
> > response)
> > throws ServletException, IOException {
> > processRequest(request, response);
> > }
> >
> > /**
> > * Handles the HTTP <code>POST</code> method.
> > *
> > * @param request servlet request
> > * @param response servlet response
> > * @throws ServletException if a servlet-specific error occurs
> > * @throws IOException if an I/O error occurs
> > */
> > @Override
> > protected void doPost(HttpServletRequest request, HttpServletResponse
> > response)
> > throws ServletException, IOException {
> > processRequest(request, response);
> > }
> >
> > }
> >
> > and getParameter for some reason seems to truncating the value after &
> >
> > Servlet TestServlet at testingServlet TestServlet at testing
> >
> > I really need to understand as what characters are accepted and what
> > characters get truncated with getParameter.
> >
> > I am building few links on the fly which might have space,backslashes,
> > comma and & characters in it.So wanted to understand should I encode it
> via
> > js or container can take care of those for me.
>
> https://tools.ietf.org/html/rfc3986
> https://www.w3.org/TR/REC-html40/interact/forms.html#form-data-set
>
> Keep in mind that there are multiple levels of encoding here. You may
> need to encode some characters for use in a JSP as well.
>
> Mark
>
>
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